Compression Ignition Addict
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There are other threads with the same question, the general concensus has been the 6.7's are better in stock form power, mileage, and transmission function.
Emissions deleted 08-10's are said to have identical power and economy.
Having owned a 99 7.3. an 07 6.0. an 08 6.4, the 11 6.7 reminds me of the 7.3 the most. The 6.0 was good tuned and studded, the 6.4 was good but a pig at the pump.
my .02 cents.
Driving: 2011 Pale Adobe...F-350 CC 6.7 FX4 3:55-Locking Rear End-Dual Alternators-premium Lariat, moon rf, added wheel flares, 2-tone black base
Picked up 4/29/10 as of 06/20/2012 109,000+miles